Vacuum glass and manufacturing method therefor

ABSTRACT

Vacuum glass includes a piece of upper glass, a piece of lower glass, and a closed vacuum layer sandwiched between the upper class and the lower glass, the peripheries of the upper glass and the lower glass are in seal connection using two or more layers of sealing material, the upper glass and the lower glass are convex glass or flat glass, convex surfaces of the convex glass face outward, and supports are disposed between two pieces of flat glass. The manufacturing method of the vacuum glass is simple, the prepared vacuum glass and tempered vacuum glass solve the defects in the prior art, can ensure the airtightness and service life of the vacuum glass, and are suitable for mechanization, automation, and mass production.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to the deep processing technology ofglass, and more particularly to vacuum glass and method formanufacturing the same.

Description of the Related Art

Conventionally, the periphery of vacuum glass is sealed using glasssolders, metal solders or organic adhesives, but the sealing modes havethe following defects: when the glass solders are employed for edgesealing, the soldering temperature is high, which increases thedifficulty to produce fully tempered vacuum glass, and even worse, thevacuum glass tends to release gas when being melted under vacuum, whichnot only causes the glass solder to produce a lot of bubbles, but alsoalters the properties of the glass solder, thus adversely affecting thebonding strength and airtightness, and increasing the difficulty toproduce vacuum glass having long service life and high quality. When themetal solders are employed for edge sealing, because the melted metalsolders tend to volatilize under vacuum, the volatile metal gaseousmolecules deposit on the surface of the glass, or react with the airresidual in the vacuum to yield a compound depositing on the surface ofthe glass, something like forming a vacuum coating, which not onlyaffects the appearance of the vacuum glass, but also affects the lighttransmission of the vacuum glass, as a result, a satisfactory vacuumglass with good light transmission cannot be acquired; consequently,although the metal solders can reduce the sealing temperature thusproducing tempered vacuum glass, the flexible edge sealing caneffectively reduce the stress thus reducing the breakage rate of thevacuum glass, the lead-free sealing can eliminate the heavy metalpollution, vacuum glass whose edges are sealed with metal has not beenfound so far. The vacuum glass whose edges are sealed with organicadhesives is not provided with an airextraction process under hightemperatures, and the organic adhesives have poor airtightness, thevacuum degree is difficult to hold, so the formed glass is considered asfalse vacuum glass. In conclusion, such three materials as glasssolders, metal solders, and organic adhesives are not suitable for thedirect sealing of vacuum glass alone under vacuum condition.

SUMMARY OF THE INVENTION

In view of the above-described problems of existing vacuum glass, thepresent disclosure of the invention provides vacuum glass (temperedvacuum glass) and a preparation method thereof. The vacuum layer of thevacuum glass is sealed by two or more layers of sealing material, andthe preparation method thereof is simple. The produced vacuum glasssolves the defects in the prior art, has good airtightness, long servicelife, intensified strength, and good thermal and sound insulationproperties.

To achieve the above objective, one embodiment of the present disclosureprovides vacuum glass, comprising a piece of upper glass, a piece oflower glass, and a closed vacuum layer sandwiched between the upperclass and the lower glass, peripheries of the upper glass and the lowerglass are in seal connection using two or more layers of sealingmaterial, the upper glass and the lower glass are convex glass or flatglass, convex surfaces of the convex glass face outward, and supportsare disposed between two pieces of flat glass.

Preferably, the adhesive material is adhesives, solders, elastomers,flexible material, etc., more preferably, the sealing material is two orthree different kinds of sealing materials selected from glass solders,metal solders, and adhesives, or two or three sealing materials of thesame kind, including two kinds of simultaneously used glass solders,metal solders, and high temperature adhesives.

Preferably, the peripheries of the upper glass and/or the lower glassare provided with at least an edge-sealing groove, which can prevent theloss of the sealing material, increase the sealing area, and strengthenthe sealing effect.

Preferably, the sealing material is coated on one or two sides of theedge-sealing groove, or coated on a place corresponding to theedge-sealing groove, or placed in the edge-sealing groove.

Preferably, a periphery of at least one glass of the upper glass and thelower glass is provided with an edge-sealing frame, and the edge-sealingframe is integrated with the upper glass and/or the lower glass. Theedge-sealing frames on the upper and lower glass are embedded with eachother thus changing the plane seal of the edges of the glass into a mazycurved seal, and the seal connection of the upper glass and the lowerglass is achieved through the embedment of the edge-sealing frame andthe edge-sealing groove.

Preferably, the sealing material is coated on the edge-sealing frame, orcoated between adjacent edge-sealing frames, or coated on a placecorresponding to the edge-sealing frame.

Preferably, a periphery of at least one glass of the upper glass and thelower glass is provided with an edge-sealing frame, and a periphery ofat least one glass is provided with an edge-sealing groove. Theedge-sealing frames on the upper and lower glass are coordinated witheach other thus changing the plane seal of the edges of the glass into amazy curved seal, and the seal connection of the upper glass and thelower glass is achieved through the embedment of the edge-sealing frameand the edge-sealing groove.

Preferably, the sealing material is coated on one or two sides of theedge-sealing groove, or coated on a place corresponding to theedge-sealing groove, or placed in the edge-sealing groove.

Preferably, the sealing material is coated on the edge-sealing frame, orcoated between adjacent edge-sealing frames, or coated on a placecorresponding to the edge-sealing frame.

Preferably, the sealing material is coated on the edge-sealing frame, orcoated between adjacent edge-sealing frames, or coated on a placecorresponding to the edge-sealing frame; the sealing material is coatedon one or two sides of the edge-sealing groove, or coated on a placecorresponding to the edge-sealing groove, or placed in the edge-sealinggroove.

Preferably, the sealing material is glass solders or adhesives, andmetal solders; the first and/or third layers of the sealing material areglass solders or adhesives, and the second layer of the sealing materialis metal solders; the glass solders have low softening point and highviscosity, and the first sealing layer is in the innermost.

Preferably, the sealing material is glass solders, adhesives, or metalsolders; the first layer of the sealing material is adhesives or glasssolders, and the second layer of the sealing material is glass solders,adhesives, or metal solders; if both the two layers of the sealingmaterial employ glass solders, the glass solders should comprise twodifferent kinds of glass solder having different properties, forexample, the first layer of the sealing material is softened but notmelted for high temperature sealing, while the second layer of thesealing material is softened and melted for high temperature sealing.

Preferably, the sealing material comprises glass solders and adhesives;the first and/or third layers of the sealing material is adhesives orglass solders, and the second layer of the sealing material is glasssolders; if both the two layers of the sealing material employ glasssolders, the glass solders should comprise two different kinds of glasssolder having different properties, for example, the first layer of thesealing material is softened but not melted for high temperaturesealing, while the second layer of the sealing material is softened andmelted for high temperature sealing.

Preferably, the supports are made of low temperature glass or highpolymers.

Preferably, the supports are printed on the upper glass or the lowerglass, and are dotted or cylindrical in shape.

Preferably, the supports are printed on both the upper glass and thelower glass, and are strip or linear in shape, and when the upper glassand the lower glass are merged, the supports on the upper and lowerglass can alternatively support the glass.

Preferably, tops of the supports are mechanically processed to be flator arc-shaped, and the tops of the flat supports are in the same plane.

Preferably, the upper and/or lower glass is transparent and/or colorlessglass.

Preferably, the upper and/or lower glass is opaque and/or color glass.

In another aspect, the present disclosure provides a method formanufacturing the vacuum glass, the method comprising the followingsteps:

1) cutting and acquiring two pieces of flat glass having dimensionscorresponding to a desired shape and size of the vacuum glass, andgrinding, chamfering, washing, and drying the two pieces of flat glass;

2) when manufacturing convex vacuum glass, performing hot bending on thetwo pieces of flat glass to form convex surfaces; when manufacturingflat vacuum glass, disposing the supports on at least one piece of flatglass, if disposing the supports on the two pieces of flat glass,staggering the supports on the two pieces of glass so as to ensure thealternate support of merged upper glass and lower glass; and whenpreparing tempered vacuum glass, tempering the two pieces of glass,respectively;

3) uniformly coating two or more layers of sealing material onperipheries of sealing surfaces of the lower glass or the two pieces ofglass, the sealing material comprising a plurality ofuniformly-distributed air extraction holes which can accelerate the airextraction rate, merging the two pieces of glass and putting into avacuum furnace; according to the properties of the sealing material andthe glass and the requirements of manufacturing process, preheating orpre-evacuating the glass prior to or after the merging; and

4) vacuumizing the vacuum furnace to less than 0.1 Pa and heating thevacuum furnace to above a softening temperature of at least one sealingmaterial, sealing the vacuum layer using the at least one sealingmaterial by gravity or external pressure; continuing heating the vacuumfurnace in vacuum or in air to reach a melting temperature of a secondor third sealing material, holding the temperature, stopping heating,naturally cooling the furnace, whereby sealing the two pieces of glassby the sealing material, opening a furnace door of the vacuum furnace toobtain the vacuum glass.

Preferably, in 3), the sealing material is two or three different kindsof sealing materials selected from glass solders, metal solders, andadhesives, or two different glass solders, or a mixture of the same kindof materials (e.g., two glass solders having different properties), or amixture of different kinds of materials.

Preferably, in 4), following the seal achieved by at least one sealingmaterial, removing the vacuum, heating the vacuum furnace in air toreach a melting temperature of a second or third sealing material,holding the temperature, stopping heating, naturally cooling thefurnace, whereby sealing the two pieces of glass by the sealingmaterial, opening a furnace door of the vacuum furnace to obtain thevacuum glass.

Preferably, in 2), the supports are made of low temperature glass orhigh polymers; the supports printed on the upper glass or the lowerglass are dotted or cylindrical in shape, and the supports printed onboth the upper glass and the lower glass are strip or linear in shape.

Preferably, in 2), the supports are printed prior to or after thetempering of the glass; when the supports are printed prior to thetempering of the glass, after being tempered, the supports aremechanically ground to remove and flatten tips of the supports, followedby rounding of top edges of the supports.

Preferably, in 1), prior to grinding, chamfering, washing, and drying,the method further comprises disposing one or more edge-sealing grooveson at least the upper or lower glass.

Preferably, the metal solders can fill up the space between the twolayers of adhesives or connect the upper and lower glass, optionally,the metal solders may not fill up the space between the two layers ofadhesives or not connect the upper and lower glass, which function as acoating material.

Preferably, in 2), the method further comprises disposing one or moreedge-sealing frames on peripheries of sealing surfaces of at least oneglass of the upper glass and/or the lower glass; when manufacturingconvex vacuum glass, performing hot bending on the two pieces of flatglass to form convex surfaces; when manufacturing flat vacuum glass,disposing the supports on at least one piece of flat glass, if disposingthe supports on the two pieces of flat glass, staggering the supports onthe two pieces of glass so as to ensure the alternate support of mergedupper glass and lower glass; and when preparing tempered vacuum glass,tempering the two pieces of glass, respectively.

Preferably, in 3), the method comprises coating two or more two or morelayers of sealing material on peripheries of sealing surfaces of thelower glass or the two pieces of glass, and a second sealing layer is ametal sealing layer; if the upper glass and/or the lower glass comprisesthe edge-sealing frame, the sealing material is coated on theedge-sealing frame, or coated between adjacent edge-sealing frames, orcoated on a place corresponding to the edge-sealing frame; if the upperglass and/or the lower glass comprises the edge-sealing groove, thesealing material is coated on one or two sides of the edge-sealinggroove, or coated on a place corresponding to the edge-sealing groove,or placed in the edge-sealing groove; the sealing material comprises aplurality of uniformly-distributed air extraction holes, the two piecesof glass are merged and put into a vacuum furnace which is a continuousvacuum furnace or a batch-type vacuum furnace; according to theproperties of the sealing material and the glass and the requirements ofmanufacturing process, performing pretreatment comprising washing,heating and evacuating the glass prior to or after the merging.

Advantages of the vacuum glass and the manufacturing method thereof aresummarized as follows:

The vacuum glass of the present disclosure employs two or more sealingmaterials to form two or more sealing layers to seal the upper and lowerglass. The vacuum layer of the vacuum glass is compositely sealed usingdifferent sealing materials which present different properties underdifferent stages and different temperatures in the sealing process ofthe vacuum glass. The present disclosure makes full use of theadvantages of different sealing materials, solves the conventionaldefects through the mutual coordination of the sealing materials underdifferent temperatures, and solves the technical problems facing onesealing material and one layer of sealing. When the first and thirdlayers of sealing materials for sealing the vacuum layer of the vacuumglass in the present disclosure preferably employ glass solders or highpolymers, and the second sealing layer preferably employ metal solders,the main role of the first sealing layer is to seal the vacuum layerbefore the metal solders are melted, thus preventing the gaseousmolecules resulting from the melting of the metal solders from enteringthe vacuum layer and depositing on the glass surface, so it is notnecessary to pay much attention on the sealing temperature, mechanicalproperties, water resistant properties, ageing resistant properties, andthe duration of the airtightness of the first layer of sealing material;so, there is a large range of choice for the first sealing material,which is favorable to reducing the production costs. The second sealingmaterial made of metal solders is heated and melted after the vacuumglass is sealed by the first and third sealing materials, which canprevent the metal vapor from depositing on the glass surface, preventthe volatilization of the metal solders in large scale, thus saving thematerials and reducing the costs, and the produced vacuum glass sealedby metal solders has good light transmission. Preferably, the vacuumglass of the present disclosure employs two or three sealing layers, ifglass solders are applied in the first or third sealing layer, the glasssolders can be controlled to soften but not melt, which not only reducesthe sealing temperature, but also solves the problems that the glasssolders tend to bubble, carbonize, exhibit low adhesion properties,large brittleness, tenacity-free, poor long-term airtightness, highsealing temperature thus causing the tempered glass to anneal andresulting in the failure to produce vacuum glass and tempered vacuumglass; in addition, the problems of the deposition of metal solders onthe glass surface, the large consumption of the metal solders, poorlong-term airtightness of the polymers, and short service life of thevacuum glass are also solved. When the metal solders are used as thefirst sealing layer, the deposition of the metal solders on the glasssurface can achieve the vacuum plating effect, or the metal soldersfunction as an air absorber to absorb the air in the vacuum layer. Thecoordination of various sealing materials greatly improves the sealingproperties of the vacuum layer between the upper glass and the lowerglass and significantly prolongs the service life of the vacuum glass.Through direct sealing of the edges of the glass under vacuum, thepreparation and sealing of the air extraction holes are omitted, so thatthe vacuum glass and tempered vacuum glass can be one-step manufacturein large quantity, which promotes the industrial production of thevacuum glass and tempered vacuum glass, greatly improves the productionefficiency and acceptability rate of the vacuum glass, and reduces theproduction costs of the vacuum glass. In addition, compared existingvacuum glass on the market, the hard and brittle connection of the upperglass and the lower glass is transformed into a soft and ductileconnection of the present disclosure, which reduces the stress producedin the sealing process, reduces the stress formed by the temperaturedifference between inside and outside of the vacuum glass, thus greatlyreducing the explosive rate of the vacuum glass.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of vacuum glass in accordance with Example1 of the invention;

FIG. 2 is a schematic diagram of vacuum glass in accordance with Example2 of the invention;

FIG. 3 is a schematic diagram of vacuum glass in accordance with Example3 of the invention;

FIG. 4 is a schematic diagram of vacuum glass in accordance with Example4 of the invention;

FIG. 5 is a schematic diagram of vacuum glass in accordance with Example5 of the invention;

FIG. 6 is a schematic diagram of vacuum glass in accordance with Example6 of the invention;

FIG. 7 is a schematic diagram of vacuum glass in accordance with Example7 of the invention;

FIG. 8 is a schematic diagram of vacuum glass in accordance with Example8 of the invention;

FIG. 9 is a schematic diagram of vacuum glass in accordance with Example9 of the invention;

FIG. 10 is a schematic diagram of vacuum glass in accordance withExample 10 of the invention;

FIG. 11 is a schematic diagram of vacuum glass in accordance withExample 11 of the invention;

FIG. 12 is a schematic diagram of vacuum glass in accordance withExample 12 of the invention;

FIG. 13 is a schematic diagram of vacuum glass in accordance withExample 13 of the invention;

FIG. 14 is a schematic diagram of vacuum glass in accordance withExample 14 of the invention;

FIG. 15 is a schematic diagram of vacuum glass in accordance withExample 15 of the invention;

FIG. 16 is a schematic diagram of vacuum glass in accordance withExample 16 of the invention;

FIG. 17 is a schematic diagram of vacuum glass in accordance withExample 18 of the invention;

FIG. 18 is a schematic diagram of vacuum glass in accordance withExample 19 of the invention;

FIG. 19 is a schematic diagram of vacuum glass in accordance withExample 20 of the invention;

FIG. 20 is a schematic diagram of vacuum glass in accordance withExample 24 of the invention;

FIG. 21 is a schematic diagram of vacuum glass in accordance withExample 25 of the invention;

FIG. 22 is a schematic diagram of vacuum glass in accordance withExample 26 of the invention;

FIG. 23 is a schematic diagram of vacuum glass in accordance withExample 27 of the invention;

FIG. 24 is a schematic diagram of vacuum glass in accordance withExample 28 of the invention;

FIG. 25 is a schematic diagram of vacuum glass in accordance withExample 29 of the invention; and

FIG. 26 is a schematic diagram of vacuum glass in accordance withExample 30 of the invention.

Legends: 1. Upper glass; 2. Lower glass; 3. First sealing layer; 4.Second sealing layer; 5. Third sealing layer; 6. Support; 7. Groove; 8.Frame; 9. Middle glass.

DETAILED DESCRIPTION OF THE EMBODIMENTS

For further illustrating the invention, experiments detailing vacuumglass and manufacturing method thereof are described below. It should benoted that the following examples are intended to describe and not tolimit the invention.

The present disclosure provides vacuum glass, comprising a piece ofupper glass, a piece of lower glass, and a closed vacuum layersandwiched between the upper class and the lower glass; peripheries ofthe upper glass and the lower glass are in seal connection using two ormore layers of sealing material, the upper glass and the lower glass areconvex glass or flat glass, convex surfaces of the convex glass faceoutward, and supports are disposed between two pieces of flat glass.

Preferably, the adhesive material is adhesives, solders, elastomers,flexible material, etc., more preferably, the sealing material is two orthree different kinds of sealing materials selected from glass solders,metal solders, and adhesives, or two or three sealing materials of thesame kind; two kinds of glass solders, metal solders, and hightemperature adhesives are simultaneously used to seal the vacuum layerof the vacuum glass using two or more sealing layers.

The first sealing layer is innermost, that is, the first sealing layeris closest to the vacuum layer.

The two or more layers of sealing material are two or three differentkinds of sealing materials selected from glass solders, metal solders,and adhesives, or two or three sealing materials of the same kind; atleast one sealing layer is metal solders, because metal solders havebetter airtightness, flexibility, tenacity, and wide solderingtemperature range, they can ensure the airtightness of vacuum glass,reduce the stress of glass, and prolong the service life, thusfacilitating the production of tempered vacuum glass.

Preferably, with regard to the two or more layers of sealing material,glass solders or adhesives are used as the first sealing layer of thevacuum layer, metal solders are used as the second sealing layer of thevacuum layer; under the protection of the first sealing layer, the metalsolders can be prevented from volatilizing and depositing on the glasssurface facing the vacuum layer, thus producing vacuum glass having highlight transmission.

Preferably, the sealing material comprises glass solders and adhesives,the first or third sealing material of the vacuum layer employsadhesives or glass solders, and the second sealing material is glasssolders; if both the two sealing layers adopt glass solders, theselected two glass solders should have different characteristics, forexample, the first layer of the sealing material is softened but notmelted for high temperature sealing, while the second layer of thesealing material is softened and melted for high temperature sealing.

Preferably, if glass solders are used as the first or third layer ofsealing material, low melting point glass solders should be selected,more preferably, glass solders having low softening point and highviscosity are selected, with a softening temperature of 150-380□,particularly 200-320□; after being softened, the glass solders have highviscosity, and do not flow at the temperature of 300-460□, and do notflow at the temperature of 340-420□.

Preferably, if glass solders are used as the second or third layer ofsealing material, low melting point glass solders should be selected,more preferably, glass solders having low softening point and lowsoldering temperature are selected, with a softening temperature of150-380□, particularly 200-320□, a soldering temperature of 320-460□,particularly 340-420□.

Preferably, the metal solders comprise metal and alloy solders, with asoldering temperature of 150-400□, particularly 280-380□, such as tinand tin alloy, magnesium and magnesium alloy, zinc and zinc alloy, orthe like.

Preferably, the adhesives are high temperature resistant inorganic ororganic adhesives or composite adhesives, the highest temperature can be150-400□, such as high temperature resistant organic adhesives(polyimide, polybenzimidazole, polybenzothiazole, polyarylsulfone,polyphenylene sulfide, organosilicon, modified epoxy resin, phenolicresin and polyarylether, etc.), high temperature resistant coatings,high temperature resistant inorganic adhesives, organic or inorganichigh temperature resistant composite adhesives, or the like.

Preferably, the glass solders have low softening point and highviscosity, and when the metal solders are melted, the glass solders donot flow.

Preferably, with regard to two or more layers of sealing material, whenthe metal solders are used as the second layer of sealing material,preferably, the melting point of the metal solders is higher than thesoftening point of the first layer of sealing material, that is to say,only when the first layer of sealing material is melted, can the metalsolders start to melt.

Preferably, the first sealing layer is a permanent or temporary, i.e.,only after the metal solders are melted, the first sealing layer sealsthe vacuum layer to prevent the gaseous molecules of the metal soldersfrom entering the vacuum layer and depositing on the glass surface thusaffecting the light transmission of the glass, which means, the metalsolders play a major role in sealing the vacuum glass, and other sealingmaterials are auxiliary for sealing the vacuum glass.

Preferably, with regard to two or more layers of sealing material, threesealing layers are more preferable, specifically, the first sealinglayer is glass solders or adhesives, the second sealing layer is metalsolders, and the third sealing layer is glass solders or adhesives.

Preferably, with regard to two or more layers of sealing material, whenthe sealing material is adhesives and glass solders, the first sealinglayer is adhesives or glass solders or metal solders, the second sealinglayer is glass solders, or the first and third sealing layers areadhesives or glass solders, the second sealing layer is glass solders;when two sealing layers are employed, preferably, the first sealingprocess is performed under vacuum, followed by removing the vacuum, andperform the second sealing in the air.

Preferably, the two or more layers of sealing material are coated on theglass surface manually or mechanically, particularly mechanically, suchas screen or stencil printing, printer or dispenser, gumming machinecoating.

Preferably, the two or more sealing layers are formed by pressing, thatis, in the presence of extra pressure, which comprises atmosphericpressure, gravity, elastic force and mechanical force such as rollingpressure.

Preferably, the metal comprises alloy, particularly active metals havinglow melting point, high volatility, strong reducibility, and such as tinand tin alloy, magnesium and magnesium alloy, zinc and zinc alloy, orthe like.

As an improvement, the peripheries of the upper glass and/or the lowerglass are provided with at least an edge-sealing groove.

As an improvement, the periphery of the sealing surface of the upperglass is provided with the edge-sealing groove, the edge-sealing grooveis corresponding to the first or second sealing material of the lowerglass, particularly, corresponding to the second sealing material.

As an improvement, the peripheries of the sealing surfaces of the upperand lower glass are provided with the edge-sealing grooves,respectively, the upper edge-sealing groove is corresponding to thelower edge-sealing groove, particularly, corresponding to the secondsealing material.

As an improvement, the periphery of the sealing surface of the upperglass is provided with two edge-sealing grooves, the two edge-sealinggrooves are corresponding to the first and the third sealing materialsof the lower glass, respectively, the second layer of sealing materialis sandwiched between the two edge-sealing grooves; when a plurality ofedge-sealing grooves are disposed, the rest can be done in the samemanner.

As an improvement, the edge-sealing groove is a continuous groove formedon the periphery of the welding surface of the glass by mechanicalprocessing or laser processing, preferably, mechanical processing, suchas mechanical grinding, mechanical carving, etc.

As an improvement, the depth of the edge-sealing groove is 0.1-2 mm,preferably, 0.3-1 mm, the width thereof is 0.3-10 mm, preferably, 1.5-4mm.

As an improvement, the cross section of the edge-sealing groove isarbitrary in shape, preferably, arc or rectangular.

As an improvement, a periphery of at least one glass of the upper glassand the lower glass is provided with an edge-sealing frame, and theedge-sealing frame is integrated with the upper glass and/or the lowerglass, which changes the plane seal of the edges of the glass into amazy curved seal, and the seal connection of the upper glass and thelower glass is achieved through the edge-sealing frame.

As an improvement, the periphery of the sealing surface of the upperglass is provided with an edge-sealing frame, which is disposed betweentwo layers of sealing material.

As an improvement, the periphery of the sealing surface of the upper orlower glass is provided with two edge-sealing frames, which arecorresponding to two layers of sealing material, respectively.

As an improvement, the periphery of the sealing surface of the upperglass is provided with an edge-sealing frame, the periphery of thesealing surface of the lower glass is provided with two edge-sealingframes, and the edge-sealing frame on the upper glass is embeddedbetween the two edge-sealing frames on the lower glass; the sealingmaterial can be coated on the sealing frame of the lower glass and/or aplace corresponding to the upper glass.

As an improvement, a periphery of at least one glass of the upper glassand the lower glass is provided with an edge-sealing frame, and aperiphery of at least one glass is provided with an edge-sealing groove.The edge-sealing frames on the upper and lower glass are coordinatedwith each other thus changing the plane seal of the edges of the glassinto a mazy curved seal, and the seal connection of the upper glass andthe lower glass is achieved through the embedment of the edge-sealingframe and the edge-sealing groove.

As an improvement, the periphery of the sealing surface of the upperglass is provided with an edge-sealing frame, and the periphery of thesealing surface of the lower glass is provided with an edge-sealinggroove, the edge-sealing frame is corresponding to the edge-sealinggroove, and disposed between two layers of sealing material.

As an improvement, the periphery of the sealing surface of the upperglass is provided with at least one edge-sealing frame, and theperiphery of the sealing surface of the lower glass is provided with atleast two edge-sealing frames between which an edge-sealing is disposed,the edge-sealing frame on the upper glass is embedded in theedge-sealing groove between the edge-sealing frames on the lower glass;the sealing material can be coated on the sealing frame of the lowerglass and/or a place corresponding to the upper glass.

As an improvement, the periphery of the sealing surface of the upper orlower glass is provided with two edge-sealing frames, and the peripheryof the sealing surface of the lower or upper glass is provided with twoedge-sealing grooves, the edge-sealing frames are corresponding to theedge-sealing grooves, particularly corresponding to the first and thirdlayer of sealing material, and the second layer of sealing material isdisposed between two edge-sealing frames and/or edge-sealing grooves.

As an improvement, the edge-sealing frames can be made by pressing,etching, or coating, and mechanical coating is preferable, or be made ofmetal wires, temperature glass powders or adhesives which are sinteredwith glass under high temperature.

As an improvement, the coating is achieved by printing or printers ordispensers; low temperature glass powders (pastes) or adhesives or metalpowders (pastes) are placed on the glass surface to form continuous ribsbulging on the glass surface, and the ribs are integrated with the glassafter being sintered and cured under high temperature; when theedge-sealing frames are formed by coating, the coating operation iscarried out only one time, or several times.

As an improvement, the edge-sealing frame can be prepared prior to orafter the tempering of the glass; if the edge-sealing frame is preparedprior to the tempering of the glass, preferably, low temperature glasspowders (such as ink for tempered glass) is selected as raw material,which is sintered with glass under high temperature in a tougheningfurnace; if the edge-sealing frame is prepared after the tempering ofthe glass, preferably, low temperature glass solders (low softeningpoint and high viscosity) or high temperature resistant polymers (resin)are selected as raw material, at this point, the edge-sealing frame canbe used as the first and/or third sealing material.

As an improvement, the height of the edge-sealing groove is 0.1-3 mm,preferably, 0.3-1.5 mm, the width thereof is 0.2-5 mm, preferably, 1-2mm

As an improvement, the vacuum glass further comprises a piece of flatglass which is sandwiched between the upper glass and the lower glass,and two closed vacuum layer are formed by the upper glass, the lowerglass and the flat glass.

As an improvement, the vacuum glass further comprises a plurality offlat glass, thus a plurality of closed vacuum layers are formed.

As an improvement, the raw material of the supports is low temperatureglass, metal, ceramics, glass, or high temperature resistant polymers,preferably, low temperature glass or high polymers.

As an improvement, the minimum unit of the supports is dot matrix orgrid of square or equilateral triangle, and the length of side is 30-300mm, preferably, 50-100 mm. The supports are dotted, strip, linear orgrid in shape; the strip supports have a length of 0.3-5.0 mm,preferably, 1.0-3.0 mm, a width of 0.1-2.0 mm, preferably, 0.2-1.0 mm, aheight of 0.1-2.0 mm, preferably, 0.2-1.0 mm. The linear supports have awidth of 0.1-2.0 mm, preferably, 0.2-1.0 mm, a height of 0.1-2.0 mm,preferably, 0.2-1.0 mm. The dotted supports have a diameter of 0.1-3.0mm, preferably, 0.3-1.0 mm, a height of 0.1-1.0 mm, preferably, 0.2-0.6mm.

As an improvement, when low temperature glass or high polymers are usedto prepare the supports, preferably, low temperature glass powders orlow temperature glass solders or high temperature resistant polymers(precursors or adhesives) are employed, and printed or stamped ordispensed; the sintering temperature of the low temperature glasssolders is lower than that of the low temperature glass powders.

When the supports are printed on one piece of glass, the preferableshape is dotted or cylindrical; when the supports are simultaneouslyprinted on the upper and lower glass, the preferable shape is strip orlinear; when the upper glass and the lower glass are merged, thesupports on the upper and lower glass can support the merged glassalternately.

As an improvement, tops of the supports are mechanically processed to beflat or arc-shaped, and the tops of the flat supports are in the sameplane.

As an improvement, the upper and/or lower glass is transparent and/orcolorless glass.

As an improvement, the upper and/or lower glass is opaque and/or colorglass.

As an improvement, the sagitta of the convex upper and lower glass ispreferably 0.1-200 mm, more preferably, 1-20 mm, when being used as theglass of doors and windows, the convex surface of the upper and lowerglass should not protrude out of the frames of the doors and windows.

The sagitta of the convex upper and lower glass is the same; as needed,different sagitta can be designed according to the internal and externalwidth of the frames of the doors and windows.

The sealing material is coated on the periphery of the sealing surfacesof at least one of the upper glass and lower glass or two pieces ofglass, as well as the periphery of the sealing surface of the middleglass.

The sealing material contacts the upper glass, the lower glass and themiddle glass directly or via a middle layer (such as metal paste layer),or contacts the edge-sealing frame, or contacts the edge-sealing groove;the metal solders performs the seal via a transition layer (such assilver paste layer)sintered using a toughening furnace or hightemperature furnace.

In the vacuum layer, when the upper and lower glass are convex glass, ifthe plane size thereof is small or the sagittal thereof is large enoughto resist the atmospheric pressure by the convex shape and strength ofthe glass, the supports can be omitted. When the convex shape andstrength of the glass cannot resist the atmospheric pressure, a fewindispensible supports should be disposed to resist the atmosphericpressure together with the glass. When the upper and lower glass areflat glass, the supports must be disposed in the vacuum layer.

When the supports are printed prior to the tempering of the glass, lowtemperature glass powders are preferable, and sintered, cured, andintegrated with the glass under high temperature in the tougheningfurnace; when the supports are printed after the tempering of the glass,low temperature glass solders or high polymers are preferable, andsintered, cured, and integrated with the glass under high temperature inthe vacuum furnace.

When the supports are printed prior to the tempering of the glass,preferably, after being tempered, the supports are mechanically groundto remove and flatten tips of the supports, thus eliminating thedeformation of the tempered glass and increasing the supporting area;subsequently, the flattened top edges of the supports are rounded, so asto eliminate the stress, prevent the break of the supports or glass, andenhance the shock resistance of the vacuum glass.

The upper and lower glass may be common glass, ultra-clear glass,tempered glass, semi tempered glass, or low emissivity glass, wiredglass, rolled glass, hot-melt glass, enamelled glass, or a combinationof two or three of the aforesaid glass, preferably, ultra-clear glass,tempered glass, semi tempered glass, or low emissivity glass, or acombination of two or three of the aforesaid glass.

When the upper and lower glass are low emissivity glass, the filmcoating is followed by the tempering, or the film coating follows thetempering; to solve the problem of the smoothness and oxidationdiscoloration of the film of the tempered glass, preferably, the filmcoating follows the tempering, and a continuous tempering furnace isemployed; preferably, the glass is ultra-clear glass, which can preventthe self-destruction of the glass.

The present disclosure also provides a method for manufacturing thevacuum glass, the method comprising the following steps:

1) cutting and acquiring two pieces of flat glass having dimensionscorresponding to a desired shape and size of vacuum glass, and grinding,chamfering, washing, and drying the two pieces of flat glass;

2) when manufacturing convex vacuum glass, performing hot bending on thetwo pieces of flat glass to form convex surfaces; when manufacturingflat vacuum glass, disposing the supports on at least one piece of flatglass, if disposing the supports on the two pieces of flat glass,staggering the supports on the two pieces of glass so as to ensure thealternate support of merged upper glass and lower glass; and whenpreparing tempered vacuum glass, tempering the two pieces of glass,respectively;

3) uniformly coating two or more layers of sealing material onperipheries of sealing surfaces of the lower glass or the two pieces ofglass, the sealing material comprising a plurality ofuniformly-distributed air extraction holes which can accelerate the airextraction rate, merging the two pieces of glass and putting into avacuum furnace; according to the properties of the sealing material andthe glass and the requirements of manufacturing process, preheating orpre-evacuating the glass prior to or after the merging; and

4) vacuumizing the vacuum furnace to less than 0.1 Pa and heating thevacuum furnace to above a softening temperature of at least one sealingmaterial, sealing the vacuum layer using the at least one sealingmaterial by gravity or external pressure; continuing heating the vacuumfurnace in vacuum or in air to reach a melting temperature of a secondor third sealing material, holding the temperature, stopping heating,naturally cooling the furnace, whereby sealing the two pieces of glassby the sealing material, opening a furnace door of the vacuum furnace toobtain the vacuum glass.

The one-step forming of vacuum glass comprising two vacuum layers issummarized as follows:

Following the pretreatment, the periphery of the sealing surfaces of theupper, lower, and middle glass are uniformly coated with the sealingmaterial; the sealing material comprises a plurality of slots or slitslongitudinally running through the sealing material as air extractionholes; the three pieces of glass are merged and put into a vacuumsealing surface, then vacuumizing the vacuum furnace to less than 0.1 Paand heating the vacuum furnace to above a softening temperature of atleast one sealing material, sealing the vacuum layer using the at leastone sealing material by gravity or external pressure; continuing heatingthe vacuum furnace to reach a melting temperature of a second or thirdsealing material, holding the temperature, stopping heating, naturallycooling the furnace, whereby sealing the two pieces of glass by thesealing material, opening a furnace door of the vacuum furnace to obtainthe vacuum glass.

Preferably, in 4), following the seal achieved by at least one sealingmaterial, removing the vacuum, heating the vacuum furnace in air toreach a melting temperature of a second or third sealing material,holding the temperature, stopping heating, naturally cooling thefurnace, whereby sealing the two pieces of glass by the sealingmaterial, opening a furnace door of the vacuum furnace to obtain thevacuum glass.

Preferably, in 2), the supports are made of low temperature glass orhigh polymers; the supports printed on the upper glass or the lowerglass are dotted or cylindrical in shape, and the supports printed onboth the upper glass and the lower glass are strip or linear in shape.

Preferably, the supports are printed prior to or after the tempering ofthe glass; when the supports are printed prior to the tempering of theglass, after being tempered, the supports are mechanically ground toremove and flatten tips of the supports, followed by rounding of topedges of the supports.

Preferably, in 1), prior to grinding, chamfering, washing, and drying,the method further comprises disposing one or more edge-sealing grooveson at least the upper or lower glass.

Preferably, in 2), the method further comprises disposing one or moreedge-sealing frames on peripheries of sealing surfaces of at least oneglass of the upper glass and/or the lower glass; when manufacturingconvex vacuum glass, performing hot bending on the two pieces of flatglass to form convex surfaces; when manufacturing flat vacuum glass,disposing the supports on at least one piece of flat glass, if disposingthe supports on the two pieces of flat glass, staggering the supports onthe two pieces of glass so as to ensure the alternate support of mergedupper glass and lower glass; and when preparing tempered vacuum glass,tempering the two pieces of glass, respectively.

Preferably, in 3), the method comprises coating two or more two or morelayers of sealing material on peripheries of sealing surfaces of thelower glass or the two pieces of glass prepared in 2); if the upperglass and/or the lower glass comprises the edge-sealing frame oredge-sealing groove, the sealing material is coated on a placecorresponding to the edge-sealing groove or edge-sealing frame; thesealing material comprises a plurality of uniformly-distributed airextraction holes, the two pieces of glass are merged and put into avacuum furnace which is a continuous vacuum furnace or a batch-typevacuum furnace; according to the properties of the sealing material andthe glass and the requirements of manufacturing process, performingpretreatment comprising washing, heating and evacuating the glass priorto or after the merging.

To reduce the construction cost and save the energy consumption, thevacuum furnace may comprise a basic heating system and local heatingsystem; the basic heating system employs a resistance heating mode, suchas electric heating wire, electric heating tube, electric heating plate,etc., to heat the vacuum furnace and the glass to a base temperature;thereafter, the periphery of the glass, that is, the sealing positionsof the glass, is locally heated using resistance heating, infraredheating, laser heating, electromagnetic heating or microwave heating, soas to heat and melt the sealing material in a short time.

The temperature range of the basic heating is preferably 150-300□, andthe temperature range of the local heating is preferably 280-450□.

To shorten the time for vacuumization and enhance the productionefficiency, prior to merging, the upper and lower glass are washed usingultraviolet or plasma, so as to remove the gaseous molecules and watermolecules adsorbed on the glass surface.

To shorten the heating time and enhance the production efficiency, priorto or after merging, the upper and lower glass arepreheated, so as toenhance the heating uniformity of the glass.

To shorten the time for vacuumization and enhance the heating uniformityof the glass, when the first and/or third sealing material take effects,the vacuum is removed, and the heating is performed in the air.

To shorten the time for vacuumization and enhance the vacuum degree ofthe vacuum layer, active metals, such as aluminum, magnesium, etc., canbe placed in the vacuum layer.

To enhance and maintain the vacuum degree of the vacuum layer andprolong the service life of the vacuum glass, a gas absorbent can beplaced in the vacuum layer, and the gas absorbent is evaporable ornon-evaporable.

The vacuum furnace is a batch-type vacuum heating furnace or acontinuous vacuum heating furnace, and a continuous vacuum heatingfurnace is preferable.

The merging of the upper glass and the lower glass can be achieved in oroutside the vacuum furnace; when the vacuum furnace is a continuousvacuum heating furnace, the merging is made preferably in the furnace.

The present invention is further illustrated with specific embodiments.

Example 1

As shown in FIG. 1, vacuum glass comprises composite sealing materialand two pieces of tempered glass, one of which is a piece of lowemissivity glass. The vacuum glass is manufactured as follows: firstly,cutting and acquiring a piece of flat glass and a piece of lowemissivity glass both having dimensions corresponding to a desired shapeand size of vacuum glass, and grinding, chamfering, washing, and dryingthe two pieces of glass; secondly, disposing cylindrical supports 6 onthe upper glass 1 or the lower glass 2 using tempered glass ink and aglue dispenser, putting the two pieces of glass into a tempered furnacewhere the supports are sintered on the glass; mechanically grinding thesintered supports 6 to flatten the tops thereof, and then rounding topedges of the supports 6 so as to eliminate the stress; uniformly coatingone layer of low temperature glass solder and two layers of siliconeadhesive on the periphery of one or two pieces of the glass using acoating machine, the first sealing material 3 and the third sealingmaterial 5 are silicone adhesive, the second sealing material 4 is lowtemperature glass solder which is sandwiched between the two layers ofsilicone adhesive, the solder comprises a plurality of air extractionholes, merging and sending the two pieces of the glass into a vacuumfurnace; pretreating the two pieces of glass prior to or after themerging to remove the gas adsorbed on the glass surface and the volatilesubstances in the solder; finally, vacuumizing the vacuum furnace toless than 0.1 Pa and heating the vacuum furnace to above 300□,extracting the air in the glass under high temperature, sealing thevacuum layer and the low temperature glass solder using the siliconeadhesive by gravity or external pressure so as to prevent the gasrelease, bubbling or carbonization of the glass solder under vacuum;continuing heating the vacuum furnace to above a softening temperatureof 350□ of the glass solder, the glass solder being softened, stoppingheating, naturally cooling the furnace, whereby sealing the two piecesof glass by the silicone adhesive and the glass solder, opening afurnace door of the vacuum furnace to obtain the vacuum glass.

The inventive step of the present disclosure lies in that: in the dryingand sintering process, the volume of the dotted supports contracts andvaries, leading to nonuniform top height and the formation of the tips,so that the stress is concentrated, reducing the shock resistance of thetempered glass; in the present disclosure, the tips of the supports aremechanically ground and flattened, thus increasing the supporting areawith the glass, and improving the shock resistance of the temperedglass.

The glass solder is sealed by the silicone adhesive, thus eliminatingthe effect of the vacuum on the glass solder.

The softened glass solder has good airtightness, thus solving theproblem of poor airtightness of the silicone adhesive.

Example 2

As shown in FIG. 2, a flat vacuum glass comprises two sealing layers andtwo pieces of tempered glass, one of which is a piece of low emissivityglass. The vacuum glass comprises a piece of upper glass 1, a piece oflower glass 2, and a closed vacuum layer sandwiched between the upperglass 1 and the lower glass 2. The first sealing layer 3 is polyimideadhesive, the second sealing layer 4 is a metal solder, the peripheriesof the two pieces of glass are welded using the first sealing layer ofpolyimide adhesive and the second sealing layer of the metal solder, avacuum layer is disposed between the two pieces of the glass. The vacuumglass is manufactured as follows: firstly, cutting and acquiring twopieces of flat glass having dimensions corresponding to a desired shapeand size of vacuum glass, and grinding, chamfering, washing, and dryingthe two pieces of glass; secondly, coating silver paste on the weldingsurface of the metal solder of the two pieces of glass, putting the twopieces of glass into a tempered furnace where the coated silver slurryis also sintered on the glass; thirdly, disposing linear supports 6 onthe two pieces of glassusing polyimide adhesives and a glue dispenser,the supports on the upper and lower glass are staggered after the twopieces of glass are merged; uniformly coating polyimide adhesive and tinalloy soldering paste on the periphery of one or two pieces of the glassusing a coating machine, the solder comprises a plurality of airextraction holes, placing a gas absorbent in between the two pieces ofthe glass, merging and sending the two pieces of the glass into a vacuumfurnace; pretreating the two pieces of glass prior to or after themerging to remove the gas adsorbed on the glass surface and the volatilesubstances in the solder; finally, vacuumizing the vacuum furnace toless than 0.1 Pa and heating the vacuum furnace to above a gellingtemperature of 250□ of the polyimide, the gas absorbent being activatedunder high temperature and high vacuum, sealing the vacuum layer usingthe polyimide adhesive which is cured and softened by gravity orexternal pressure so as to prevent the gas release, bubbling orcarbonization of the glass solder under vacuum; continuing heating thevacuum furnace to above a melting temperature of 280□ of the tin alloy,the tin alloy being softened, stopping heating, naturally cooling thefurnace, whereby sealing the two pieces of glass by the tin alloy,opening a furnace door of the vacuum furnace to obtain the vacuum glass.

The inventive step of the present disclosure lies in that: the linearand ductile supports prepared by the polyimide adhesives enhance theshock resistance of the vacuum glass, and when the glass breaks, thesupports can adhere to the glass fragments and prevent the falling ofthe glass, thus further enhancing the safety of the glass.

In this example, the peripheries of the two pieces of glass can besoldered using a first sealing layer 3 which is metal solders and asecond sealing layer 4 which is low temperature glass solder.

Example 3

As shown in FIG. 3, a flat vacuum glass comprises three layers ofsealing material and two pieces of tempered glass, one of which is apiece of low emissivity glass. The vacuum glass is manufactured asfollows: firstly, cutting and acquiring a piece of flat glass and apiece of low emissivity glass both having dimensions corresponding to adesired shape and size of vacuum glass, and grinding, chamfering,washing, and drying the two pieces of glass; secondly, disposing stripsupports 6 on the two pieces of glass using tempered glass ink and aglue dispenser, putting the two pieces of glass into a tempered furnacewhere the supports are sintered on the glass; mechanically grinding thesintered supports 6 to flatten the tops thereof, and then rounding topedges of the supports so as to eliminate the stress; uniformly coatingtwo layers of low temperature glass solder and one layer of magnesiumalloy powders on the periphery of one or two pieces of the glass using acoating machine, the first sealing material 3 and the third sealingmaterial 5 are glass solders, the second sealing material 4 is magnesiumalloy powders which are sandwiched between the two layers of the glasssolder, the solder comprises a plurality of air extraction holes,merging and sending the two pieces of the glass into a vacuum furnace;pretreating the two pieces of glass prior to or after the merging toremove the gas adsorbed on the glass surface and the volatile substancesin the solder; finally, vacuumizing the vacuum furnace to less than 0.1Pa and heating the vacuum furnace to above a softening temperature of280□ of the low temperature glass solder, following the softening of thelow temperature glass solder, sealing the magnesium alloy using thesoftened low temperature glass solder by gravity or external pressure soas to prevent the volatilization of the magnesium alloy; continuingheating the vacuum furnace to above a melting temperature of 320□ of themagnesium alloy, the magnesium alloy being softened, stopping heating,naturally cooling the furnace, whereby sealing the two pieces of glassby the magnesium alloy, opening a furnace door of the vacuum furnace toobtain the vacuum glass.

The inventive step of the present disclosure lies in that: the vacuumglass of the embodiment comprises three layers of sealing material,prior to the melting of the metal solder, the volatilization is smalland is sealed in a fixed space by the softened glass solder, thusavoiding the large quantity of volatilization of the metal solder,prevent the pollution of the glass, vacuum furnace and the vacuum pump,and reducing the loss of the metal solder.

Both the upper glass and the lower glass are provided with stripsupports which are vertically disposed, the contact of the upper andlower glass via the supports is point contact, and the contact betweenthe supports and the glass is linear contact, thus increasing thecontact area, reducing the stress of the glass in the support positions,so, the quantity of the supports can be reduced, which further improvesthe transparency, sound and thermal insulation properties of the glass.

Example 4

As shown in FIG. 4, a flat vacuum glass comprises two sealing layers andtwo pieces of tempered glass, one of which is a piece of low emissivityglass. The vacuum glass is manufactured as follows: firstly, cutting andacquiring a piece of flat glass and a piece of low emissivity glass bothhaving dimensions corresponding to a desired shape and size of vacuumglass, and grinding, chamfering, washing, and drying the two pieces ofglass; secondly, putting the two pieces of glass into a temperedfurnace; furthermore, disposing cylindrical supports 6 using polyimideadhesive and a glue dispenser, uniformly coating one layer of polyimideadhesive and one layer of low temperature glass solder on the peripheryof one or two pieces of the glass using a coating machine, the firstsealing material 3 is the polyimide adhesive, the second sealingmaterial 4 is low temperature glass solder which comprises a pluralityof air extraction holes, merging and sending the two pieces of the glassinto a vacuum furnace; pretreating the two pieces of glass prior to orafter the merging to remove the gas adsorbed on the glass surface andthe volatile substances in the solder; finally, vacuumizing the vacuumfurnace to less than 0.1 Pa and heating the vacuum furnace to above anair extraction temperature of 320□ of the glass, following theextraction of the air in the glass, sealing the vacuum layer using thepolyimide adhesive by gravity or external pressure, the supports 6 andthe upper and lower glass being tightly contacted; removing the vacuum,continuing heating the vacuum furnace to above a melting temperature of420□ of the low temperature glass solder, the low temperature glasssolder being melted, and the supports 6 being cured on the glass;stopping heating, naturally cooling the furnace, whereby sealing the twopieces of glass by the polyimide adhesive and the low temperature glasssolder, opening a furnace door of the vacuum furnace to obtain thevacuum glass.

The inventive step of the present disclosure lies in that: the polyimidesupports have good ductility and thermoplasticity and tend to deformunder high temperatures and pressure, so all the supports have anappropriate contact with the glass, thus reducing the stress exerted onthe glass and the supports, and improving the shock resistance of thevacuum glass.

Sealed by the polyimide, the low temperature glass solder is heated andmelted in the air, thus eliminating the effect of the vacuum on the lowtemperature glass solder.

The double seal makes the vacuum glass has better sealing effect andlonger service life.

Example 5

As shown in FIG. 5, vacuum glass comprises three layers of sealingmaterial, two vacuum layers and at least two pieces of tempered glass,one of which is a piece of low emissivity glass. The vacuum glass ismanufactured as follows: firstly, cutting and acquiring two pieces ofultra-clear glass and a piece of low emissivity glass all havingdimensions corresponding to a desired shape and size of vacuum glass,and grinding, chamfering, washing, and drying the two pieces of glass;secondly, disposing dotted supports 6 on the two pieces of ultra-clearglass using tempered glass ink and a glue dispenser, putting the twopieces of glass into a tempered furnace where the supports 6 aresintered on the glass, performing semi-tempering on the low emissivityglass; mechanically grinding the sintered supports 6 to flatten the topsthereof, and then rounding top edges of the supports so as to eliminatethe stress; uniformly coating two layers of low temperature glass solderand one layer of magnesium alloy powder on the periphery of the two orthree pieces of the glass using a coating machine, the first sealingmaterial 3 and the third sealing material 5 are low temperature glasssolder, the second sealing material 4 ismagnesium alloy powder which issandwiched between the two layers of low temperature glass solder, thesolder comprises a plurality of air extraction holes, merging andsending the three pieces of the glass into a vacuum furnace; pretreatingthe three pieces of glass prior to or after the merging to remove thegas adsorbed on the glass surface and the volatile substances in thesolder; finally, vacuumizing the vacuum furnace to less than 0.1 Pa andheating the vacuum furnace to above a softening temperature of 280□ ofthe low temperature glass solder, following the softening of the lowtemperature glass solder, sealing the magnesium alloy using the softenedlow temperature glass solder by gravity or external pressure so as toprevent the volatilization of the magnesium alloy; continuing heatingthe vacuum furnace to above a melting temperature of 320□ of themagnesium alloy, the magnesium alloy being melted, stopping heating,naturally cooling the furnace, whereby sealing the three pieces of glassby the magnesium alloy, opening a furnace door of the vacuum furnace toobtain the vacuum glass.

Optionally, the vacuum glass of the embodiment comprises two layers ofsealing material, that is, coating one layer of low temperature glasssolder 4 and one layer of magnesium alloy powder 3 on the periphery oftwo or three pieces of the glass using a coating machine, and themagnesium alloy 3 is located in the inner side of the low temperatureglass solder 4.

Example 6

As shown in FIG. 6, a flat vacuum glass comprises two layers of sealingmaterial and two pieces of tempered glass, one of which is a piece oflow emissivity glass. The vacuum glass is manufactured as follows:firstly, cutting and acquiring a piece of flat glass and a piece of lowemissivity glass both having dimensions corresponding to a desired shapeand size of vacuum glass, and grinding, chamfering, washing, and dryingthe two pieces of glass; secondly, disposing two edge-sealing frames 7on the lower glass 2 using tempered glass ink and a glue dispenser,putting the two pieces of glass into a tempered furnace where theedge-sealing frames 7 are sintered on the glass; preparing cylindricalsupports 6 using polyimide adhesive and a glue dispenser, uniformlycoating one layer of polyimide adhesive on the edge-sealing frame 7 onthe inner side of the lower glass 2, loading the low temperature glasssolder in the two edge-sealing frames, the first sealing material 3 ispolyimide adhesive, the second sealing material 4 is low temperatureglass solder, the solder comprises a plurality of air extraction holes,merging and sending the two pieces of the glass into a vacuum furnace;pretreating the two pieces of glass prior to or after the merging toremove the gas adsorbed on the glass surface and the volatile substancesin the solder; finally, vacuumizing the vacuum furnace to less than 0.1Pa and heating the vacuum furnace to above an air extraction temperatureof the glass and the softening temperature of the low temperature glasssolder of 320□, following the extraction of the air in the glass,sealing the vacuum layer using the polyimide adhesive by gravity orexternal pressure, the supports 6 and the upper and lower glass beingtightly contacted; removing the vacuum, continuing heating the vacuumfurnace to above a melting temperature of 420□ of the low temperatureglass solder, the low temperature glass solder being softened, and thesupports 6 being cured on the glass; stopping heating, naturally coolingthe furnace, whereby sealing the two pieces of glass by the polyimideadhesive and the low temperature glass solder, opening a furnace door ofthe vacuum furnace to obtain the vacuum glass.

Example 7

As shown in FIG. 7, vacuum glass comprises an edge-sealing frame, threelayers of sealing material and two pieces of tempered glass, one ofwhich is a piece of low emissivity glass. The vacuum glass ismanufactured as follows: firstly, cutting and acquiring a piece of flatglass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, and grinding,chamfering, washing, and drying the two pieces of glass; secondly,disposing cylindrical supports 6 and an edge-sealing frame 7 on theupper glass 1 using tempered glass ink and a glue dispenser, putting thetwo pieces of glass into a tempered furnace where the supports and theedge-sealing frames are sintered on the glass; mechanically grinding thesintered supports 6 to flatten the tops thereof, and then rounding topedges of the supports so as to eliminate the stress; uniformly coatingtwo layers of low temperature glass solder and one layer of zinc alloywire on the periphery of one or two pieces of the glass using a coatingmachine, the first sealing material 3 and the third sealing material 5are the low temperature glass solder, the second sealing material 4 isthe zinc alloy wire which is sandwiched between the two layers of lowtemperature glass solder and corresponding to the edge-sealing frame 7,the solder comprises a plurality of air extraction holes, placing activemetal such as magnesium or aluminum to between the two pieces glass,merging and sending the two pieces of the glass into a vacuum furnace;pretreating the two pieces of glass prior to or after the merging toremove the gas adsorbed on the glass surface and the volatile substancesin the solder; finally, vacuumizing the vacuum furnace to less than 0.1Pa and heating the vacuum furnace to above a softening temperature of320□ of the low temperature glass solder, following the softening of thelow temperature glass solder, sealing the zinc alloy powder using thelow temperature glass solder by gravity or external pressure so as toprevent the volatilization of the zinc alloy; continuing heating thezinc alloy to above a melting temperature of 380□ thereof, the zincalloy being melted, stopping heating, naturally cooling the furnace,whereby sealing the two pieces of glass by the zinc alloy, opening afurnace door of the vacuum furnace to obtain the vacuum glass.

Example 8

As shown in FIG. 8, a flat vacuum glass comprises three layers ofsealing material and two pieces of tempered glass having edge-sealingframes, one of which is a piece of low emissivity glass. The vacuumglass is manufactured as follows: firstly, cutting and acquiring a pieceof flat glass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, and grinding,chamfering, washing, and drying the two pieces of glass; secondly,respectively disposing one and two edge-sealing frames 7 on the upperglass 1 and the lower glass 2 using tempered glass ink and a gluedispenser, the edge-sealing frame 7 on the upper glass is correspondingto the space between the two edge-sealing frames 7 on the lower glass,putting the two pieces of glass into a tempered furnace where theedge-sealing frames 7 are sintered on the glass; disposing stripsupports 6 on the upper glass 1 and the lower glass 2 using lowtemperature glass solder and a glue dispenser, the supports on the upperand lower glass are staggered after the two pieces of glass are merged;uniformly coating polyimide adhesive on the two edge-sealing frames 7 onthe lower glass 2 and placing a tin alloy bar in between the twoedge-sealing frames, the first sealing material 3 and the third sealingmaterial 5 are polyimide adhesive, the second sealing material 4 is thetin alloy bar, the polyimide adhesive comprises a plurality of airextraction holes, merging and sending the two pieces of the glass into avacuum furnace; pretreating the two pieces of glass prior to or afterthe merging to remove the gas adsorbed on the glass surface and thevolatile substances in the solder; finally, vacuumizing the vacuumfurnace to less than 0.1 Pa and heating the vacuum furnace to above acuring temperate of 250□ of the polyimide adhesive, thus the polyimideadhesive being cured; continuing heating the vacuum furnace to above asoftening temperature of 320□ of the polyimide adhesive and the lowtemperature glass solder, the polyimide adhesive and the low temperatureglass solder being softened, the softened polyimide adhesive sealing thetin alloy by gravity or external pressure, the upper and lower supportsmade of low temperature glass solders being staggered; continuingheating the tin alloy to above a melting temperature of 350□ of the tinalloy, the tin alloy being melted, stopping heating, naturally coolingthe furnace, whereby sealing the two pieces of glass by the polyimideadhesive and the tin alloy, opening a furnace door of the vacuum furnaceto obtain the vacuum glass.

The inventive step of the present disclosure lies in that: the vacuumglass of the embodiment comprises the upper and lower edge-sealingframes and upper and lower supports, thus having good sealing effect andsmall stress; in addition, the vacuum layer has large height and space,which reduces the conductivity of the supports and improves the thermaland sound insulation properties of the vacuum glass; the large spaceprovides much larger vacuum degree, facilitates the placement of morequantity of gas absorbent, thus prolonging the service life of thevacuum glass.

Example 9

As shown in FIG. 9, a flat vacuum glass comprises an edge-sealinggroove, three layers of sealing material and two pieces of temperedglass, one of which is a piece of low emissivity glass. The vacuum glassis manufactured as follows: firstly, cutting and acquiring a piece offlat glass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, disposing anedge-sealing groove 8 on one piece of glass, and grinding, chamfering,washing, and drying the two pieces of glass; secondly, putting the twopieces of glass into a tempered furnace; preparing linear supports 6using polyimide adhesive and a glue dispenser, the supports on the upperand lower glass are staggered after the two pieces of glass are merged;uniformly coating two layers of low temperature glass solder and onelayer of magnesium alloy powder on the periphery of one or two pieces ofthe glass using a coating machine, the magnesium alloy powder beingsandwiched between the two layers of low temperature glass solder andcorresponding to the edge-sealing groove 8, the first sealing material 3and the third sealing material 5 are low temperature glass solder, thesecond sealing material 4 is magnesium alloy powder, the soldercomprises a plurality of air extraction holes, merging and sending thetwo pieces of the glass into a vacuum furnace; pretreating the twopieces of glass prior to or after the merging to remove the gas adsorbedon the glass surface and the volatile substances in the solder; finally,vacuumizing the vacuum furnace to less than 0.1 Pa and heating thevacuum furnace to above a softening temperature of the low temperatureglass solder of 280□, following the softening of the low temperatureglass solder, sealing the magnesium alloy using the softened lowtemperature glass solder by gravity or external pressure so as toprevent the volatilization of the magnesium alloy; continuing heatingthe vacuum furnace to above a melting temperature of 320□ of themagnesium alloy, the magnesium alloy being melted; stopping heating,naturally cooling the furnace, whereby sealing the two pieces of glassby the magnesium alloy, opening a furnace door of the vacuum furnace toobtain the vacuum glass.

The inventive step of the present disclosure lies in that: thearrangement of the edge-sealing groove transforms the plane sealing ofthe glass into curve sealing, and can flexibly control the thickness ofthe vacuum layer; the linear and ductile supports prepared by thepolyimide adhesives enhance the shock resistance of the vacuum glass,and when the glass breaks, the supports can adhere to the glassfragments and prevent the falling of the glass, thus further enhancingthe safety of the glass.

Example 10

As shown in FIG. 10, a flat vacuum glass comprises two edge-sealinggrooves, two layers of sealing material and two pieces of temperedglass, one of which is a piece of low emissivity glass. The vacuum glassis manufactured as follows: firstly, cutting and acquiring a piece offlat glass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, disposingcorresponding edge-sealing grooves 8 on the upper and lower glass,respectively, and grinding, chamfering, washing, and drying the twopieces of glass; secondly, disposing strip supports 6 on the two piecesof glass using tempered glass ink and a glue dispenser, the supports onthe upper and lower glass are staggered after the two pieces of glassare merged; putting the two pieces of glass into a tempered furnacewhere the supports 6 are sintered on the glass; mechanically grindingthe sintered supports 6 to flatten the tops thereof, and then roundingtop edges of the supports so as to eliminate the stress; uniformlycoating one layer of silicone adhesive on the inner side of theedge-sealing grooves 8 of one or two pieces of glass, the lowtemperature glass solder being loaded in the edge-sealing grooves 8, thefirst sealing material 3 is silicone adhesive, and the second sealingmaterial 4 is low temperature glass solder, the solder comprises aplurality of air extraction holes, placing an active metal or gasabsorbent in between the two pieces of the glass, merging and sendingthe two pieces of the glass into a vacuum furnace; pretreating the twopieces of glass prior to or after the merging to remove the gas adsorbedon the glass surface and the volatile substances in the solder; finally,vacuumizing the vacuum furnace to less than 0.1 Pa and heating thevacuum furnace to above an air extraction temperature of 300□ of theglass, holding the temperature, sealing the vacuum layer using thesilicone adhesive by gravity or external pressure; removing the vacuum,continuing heating the vacuum furnace to above a melting temperature of420□ of the low temperature glass solder, the c low temperature glasssolder being melted, stopping heating, naturally cooling the furnace,whereby sealing the two pieces of glass by the silicone adhesive and thelow temperature glass solder, opening a furnace door of the vacuumfurnace to obtain the vacuum glass.

Example 11

As shown in FIG. 11, a flat vacuum glass comprises two edge-sealinggrooves, three layers of sealing material and two pieces of temperedglass, one of which is a piece of low emissivity glass. The vacuum glassis manufactured as follows: firstly, cutting and acquiring a piece offlat glass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, disposing twoedge-sealing grooves 8 on the upper glass 1, and grinding, chamfering,washing, and drying the two pieces of glass; secondly, putting the twopieces of glass into a tempered furnace, preparing cylindrical supports6 using polyimide adhesive and a glue dispenser; uniformly coating twolayers of polyimide adhesive and one layer of magnesium alloy powder onthe periphery of one or two pieces of the glass using a coating machine,the magnesium alloy powder being sandwiched between the two layers ofpolyimide adhesive which are corresponding to the two edge-sealinggrooves 8, the first sealing material 3 and the third sealing material 5are polyimide adhesive, the second sealing material 4 is magnesium alloypowder, the solder comprises a plurality of air extraction holes,placing an active metal or gas absorbent in between the two pieces ofthe glass, merging and sending the two pieces of the glass into a vacuumfurnace; pretreating the two pieces of glass prior to or after themerging to remove the gas adsorbed on the glass surface and the volatilesubstances in the solder; finally, vacuumizing the vacuum furnace toless than 0.1 Pa and heating the vacuum furnace to above an airextraction temperature of 300□ of the glass, holding the temperature,sealing the magnesium alloy using the polyimide adhesive by gravity orexternal pressure, so as to prevent the volatilization of the magnesiumalloy; continuing heating the vacuum furnace to above a meltingtemperature of 350□ of the magnesium alloy, the magnesium alloy beingmelted; stopping heating, naturally cooling the furnace, whereby sealingthe two pieces of glass by the magnesium alloy and the polyimideadhesive, opening a furnace door of the vacuum furnace to obtain thevacuum glass.

The inventive step of the present disclosure lies in that: thearrangement of the edge-sealing groove transforms the plane sealing ofthe glass into curve sealing, and can flexibly control the thickness ofthe vacuum layer; the ductile supports prepared by the polyimideadhesives are easy to make, have good thermal insulation properties, andenhance the shock resistance of the vacuum glass.

Example 12

As shown in FIG. 12, a flat vacuum glass comprises an edge-sealingframe, an edge-sealing groove, three layers of sealing material and twopieces of tempered glass, one of which is a piece of low emissivityglass. The vacuum glass is manufactured as follows: firstly, cutting andacquiring a piece of flat glass and a piece of low emissivity glass bothhaving dimensions corresponding to a desired shape and size of vacuumglass, disposing an edge-sealing groove 8 on the lower glass 2, andgrinding, chamfering, washing, and drying the two pieces of glass;secondly, disposing an edge-sealing frame 7 on the upper glass 1 usingtempered glass ink and glue dispenser, the edge-sealing frame 7 iscorresponding to the edge-sealing groove 8, then putting the two piecesof glass into a tempered furnace where the prepared edge-sealing frame 7is sintered on the upper glass 1; preparing cylindrical supports 6 usingpolyimide adhesive and a glue dispenser; uniformly coating two layers ofsilicone adhesive and one layer of tin alloy powder on the periphery ofone or two pieces of the glass using a coating machine, the tin alloypowder 4 being disposed in the edge-sealing groove 8 sandwiched betweenthe two layers of silicone adhesive, the first sealing material 3 andthe third sealing material 5 are silicone adhesive, the second sealingmaterial 4 is tin alloy powder, the solder comprises a plurality of airextraction holes; placing an active metal or gas absorbent in betweenthe two pieces of the glass, merging and sending the two pieces of theglass into a vacuum furnace; pretreating the two pieces of glass priorto or after the merging to remove the gas adsorbed on the glass surfaceand the volatile substances in the solder; finally, vacuumizing thevacuum furnace to less than 0.1 Pa and heating the vacuum furnace toabove an air extraction temperature of 300□ of the glass, holding thetemperature, sealing the tin alloy using the silicone adhesive bygravity or external pressure so as to prevent the volatilization of thetin alloy, the supports 6 and the upper and lower glass being tightlycontacted; continuing heating the vacuum furnace to above a meltingtemperature of 350□ of the tin alloy, the tin alloy being melted, andthe supports 6 being cured on the glass; stopping heating, naturallycooling the furnace, whereby sealing the two pieces of glass by the tinalloy and silicone adhesive, opening a furnace door of the vacuumfurnace to obtain the vacuum glass.

Example 13

As shown in FIG. 13, a flat vacuum glass comprises two edge-sealingframes, two edge-sealing grooves, three layers of sealing material andtwo pieces of tempered glass, one of which is a piece of low emissivityglass. The vacuum glass is manufactured as follows: firstly, cutting andacquiring a piece of flat glass and a piece of low emissivity glass bothhaving dimensions corresponding to a desired shape and size of vacuumglass, disposing two edge-sealing grooves 8 on the upper glass 1, andgrinding, chamfering, washing, and drying the two pieces of glass;secondly, disposing two edge-sealing frames 7 on the lower glass 2 usingtempered glass ink and glue dispenser, the edge-sealing frames 7 arecorresponding to the edge-sealing grooves 8; preparing dotted supports 6on one piece of glass using tempered glass ink and a glue dispenser,then putting the two pieces of glass into a tempered furnace where theprepared edge-sealing frames 7 and the supports are sintered on theglass; mechanically grinding the sintered supports 6 to flatten the topsthereof, and then rounding top edges of the supports so as to eliminatethe stress; uniformly coating two layers of polyimide adhesive on thetwo edge-sealing frames 7, loading magnesium alloy powders to betweenthe two edge-sealing frames 7, the first sealing material 3 and thethird sealing material 5 are polyimide adhesive, the second sealingmaterial 4 is magnesium alloy powder, the solder comprises a pluralityof air extraction holes; merging and sending the two pieces of the glassinto a vacuum furnace; pretreating the two pieces of glass prior to orafter the merging to remove the gas adsorbed on the glass surface andthe volatile substances in the solder; finally, vacuumizing the vacuumfurnace to less than 0.1 Pa and heating the vacuum furnace to above anair extraction temperature of 280□ of the glass, holding thetemperature, sealing the magnesium alloy using the polyimide adhesive bygravity or external pressure so as to prevent the volatilization of themagnesium alloy; continuing heating the vacuum furnace to above amelting temperature of 320□ of the magnesium alloy, the magnesium alloybeing melted; stopping heating, naturally cooling the furnace, wherebysealing the two pieces of glass by the magnesium alloy, opening afurnace door of the vacuum furnace to obtain the vacuum glass.

Example 14

As shown in FIG. 14, a flat vacuum glass comprises two layers of sealingmaterial and two pieces of tempered glass having edge-sealing frames,one of which is a piece of low emissivity glass. The vacuum glass ismanufactured as follows: firstly, cutting and acquiring a piece of flatglass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, disposing anedge-sealing groove 8 on the lower glass 2, and grinding, chamfering,washing, and drying the two pieces of glass; secondly, respectivelydisposing one and two edge-sealing frames 7 on the upper glass 1 and thelower glass 2 using tempered glass ink and a glue dispenser, theedge-sealing frame 7 on the upper glass is corresponding to the spacebetween the two edge-sealing frames 7 on the lower glass, andcorresponding to the edge-sealing groove 8; putting the two pieces ofglass into a tempered furnace where the edge-sealing frames 7 aresintered on the glass; disposing strip supports 6 on the upper glass 1and the lower glass 2 using low temperature glass solder and a gluedispenser, the supports on the upper and lower glass are staggered afterthe two pieces of glass are merged; uniformly coating polyimide adhesiveon the edge-sealing frame 7 on the inner side of the lower glass 2 andplacing a low temperature glass solder in between the two edge-sealingframes 7, the first sealing material 3 is polyimide adhesive, the secondsealing material 4 is the low temperature glass solder, the polyimideadhesive comprises a plurality of air extraction holes, merging andsending the two pieces of the glass into a vacuum furnace; pretreatingthe two pieces of glass prior to or after the merging to remove the gasadsorbed on the glass surface and the volatile substances in the solder;finally, vacuumizing the vacuum furnace to less than 0.1 Pa and heatingthe vacuum furnace to above an air extraction temperature of the glassof 320□, the polyimide adhesive and the low temperature glass solderbeing softened, sealing the vacuum layer using the softened polyimideadhesive by gravity or external pressure; the supports on the upper andlower glass made of low temperature glass solder are staggered; removingthe vacuum, continuing heating the glass solder to above a meltingtemperature of 420□ of the glass solder, the glass solder being melted,stopping heating, naturally cooling the furnace, whereby sealing the twopieces of glass by the polyimide adhesive and the glass solder, openinga furnace door of the vacuum furnace to obtain the vacuum glass.

The inventive step of the present disclosure lies in that: the vacuumglass of the embodiment comprises the upper and lower edge-sealingframes and upper and lower supports, thus having good sealing effect andsmall stress; in addition, the vacuum layer has large height and space,which reduces the conductivity of the supports and improves the thermaland sound insulation properties of the vacuum glass; the large spaceprovides much larger vacuum degree, facilitates the placement of morequantity of gas absorbent, thus prolonging the service life of thevacuum glass.

Example 15

As shown in FIG. 15, a convex vacuum glass, which is sealed by adhesive,comprises a piece of upper convex glass 1 and a piece of lower convexglass 2. The peripheries of the two pieces of glass are sealed by twolayers of adhesive 3, and a vacuum layer is disposed therebetween. Thevacuum glass is manufactured as follows: firstly, cutting and acquiringtwo pieces of flat glass having dimensions corresponding to a desiredshape and size of vacuum glass, loading the two pieces of flat glass toa mold and placing in a hot bending furnace, heating the furnace to theglass softening temperature of 550-750□, thus convex surfaces beingformed downwards due to the gravity of the glass, naturally cooling thefurnace down to room temperature; uniformly coating two layers ofsilicone adhesive on the periphery of one or two pieces of the glassusing a coating machine, uniformly disposing magnesium powder betweenthe two layers of silicone adhesive, the first sealing material 3 andthe third sealing material 5 are silicone adhesive, the second sealingmaterial 4 is magnesium powder, the silicone adhesive comprises aplurality of air extraction holes; merging and sending the two pieces ofthe glass into a vacuum furnace; pretreating the two pieces of glassprior to or after the merging to remove the gas adsorbed on the glasssurface and the volatile substances in the solder; finally, vacuumizingthe vacuum furnace to less than 0.1 Pa and heating the vacuum furnace toabove a bonding temperature of 220□ of the adhesive, sealing the vacuumlayer using the silicone adhesive by gravity or external pressure;continuing heating the vacuum furnace to above a volatilizationtemperature of 300□ of the magnesium powder, evaporation coating undervacuum; stopping heating, naturally cooling the furnace, whereby sealingthe two pieces of glass by the silicone adhesive and metal coating,opening a furnace door of the vacuum furnace to obtain the vacuum glass.

Example 16

As shown in FIG. 16, a flat vacuum glass comprises three sealing layersand two pieces of tempered glass, one of which is a piece of lowemissivity glass. The vacuum glass comprises a piece of upper glass 1, apiece of lower glass 2, and a closed vacuum layer sandwiched between theupper glass 1 and the lower glass 2. The peripheries of the two piecesof glass are welded using two layers of polyimide adhesive 3 and onelayer of metal solder 4. The vacuum glass is manufactured as follows:firstly, cutting and acquiring two pieces of flat glass havingdimensions corresponding to a desired shape and size of vacuum glass,and grinding, chamfering, washing, and drying the two pieces of glass;secondly, disposing supports 6 on the upper glass 1 using tempered glassink and a glue dispenser, coating silver paste on the welding surface ofthe metal solder of the two pieces of glass, putting the two pieces ofglass into a tempered furnace where the prepared supports and coatedsilver slurry are also sintered on the glass; mechanically grinding thesintered supports 6 to flatten the tops thereof, and then rounding topedges of the supports 6 so as to eliminate the stress; uniformly coatingpolyimide adhesive and tin alloy soldering paste on the periphery of oneor two pieces of the glass using a coating machine, the first sealingmaterial 3 and the third sealing material 5 are polyimide adhesive, thesecond sealing material 4 is the tin alloy paste, the adhesive comprisesa plurality of air extraction holes, placing a gas absorbent in betweenthe two pieces of the glass, merging and sending the two pieces of theglass into a vacuum furnace; pretreating the two pieces of glass priorto or after the merging to remove the gas adsorbed on the glass surfaceand the volatile substances in the adhesive; finally, vacuumizing thevacuum furnace to less than 0.1 Pa and heating the vacuum furnace toabove a curing temperature of 250□ of the polyimide, the gas absorbentbeing activated under high temperature and high vacuum, sealing thevacuum layer using the polyimide adhesive which is cured and softened bygravity or external pressure; continuing heating the vacuum furnace toabove a melting temperature of 280□ of the tin alloy, the tin alloybeing melted, stopping heating, naturally cooling the furnace, wherebysealing the two pieces of glass by the adhesive and the tin alloy,opening a furnace door of the vacuum furnace to obtain the vacuum glass.

Example 17

As shown in FIG. 3, a flat vacuum glass comprises three layers ofsealing material and two pieces of tempered glass, one of which is apiece of low emissivity glass. The vacuum glass is manufactured asfollows: firstly, cutting and acquiring a piece of flat glass and apiece of low emissivity glass both having dimensions corresponding to adesired shape and size of vacuum glass, and grinding, chamfering,washing, and drying the two pieces of glass; secondly, disposing stripsupports 6 on the two pieces of glass using tempered glass ink and aglue dispenser, putting the two pieces of glass into a tempered furnacewhere the supports are sintered on the glass; mechanically grinding thesintered supports 6 to flatten the tops thereof, and then rounding topedges of the supports so as to eliminate the stress; uniformly coatingtwo layers of polyaryletherketone and one layer of low temperature glasssolder on the periphery of one or two pieces of the glass using acoating machine, the low temperature glass solder being sandwichedbetween the two layers of polyaryletherketone; the first sealingmaterial 3 and the third sealing material 5 are polyaryletherketoneadhesive, the second sealing material 4 is low temperature glass solder,the solder comprises a plurality of air extraction holes, merging andsending the two pieces of the glass into a vacuum furnace; pretreatingthe two pieces of glass prior to or after the merging to remove the gasadsorbed on the glass surface and the volatile substances in the solder;finally, vacuumizing the vacuum furnace to less than 0.1 Pa and heatingthe vacuum furnace to above the melting temperature ofpolyaryletherketone and the softening temperature of the low temperatureglass solder of 340□, sealing the vacuum layer using the meltedpolyaryletherketone and the softened low temperature glass solder bygravity or external pressure, stopping heating, naturally cooling thefurnace, whereby sealing the two pieces of glass by thepolyaryletherketone and the low temperature glass solder, opening afurnace door of the vacuum furnace to obtain the vacuum glass.

Example 18

As shown in FIG. 17, vacuum glass comprises an edge-sealing frame, threelayers of sealing material and two pieces of tempered glass, one ofwhich is a piece of low emissivity glass. The vacuum glass ismanufactured as follows: firstly, cutting and acquiring a piece of flatglass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, and grinding,chamfering, washing, and drying the two pieces of glass; secondly,disposing cylindrical supports 6 and an edge-sealing frame 7 on theupper glass 1 using tempered glass ink and a glue dispenser, putting thetwo pieces of glass into a tempered furnace where the supports 6 and theedge-sealing frames 7 are sintered on the glass; uniformly coating twolayers of polyimide adhesive and one layer of zinc alloy wire on theperiphery of one or two pieces of the glass using a coating machine, thefirst sealing material 3 and the third sealing material 5 are polyimideadhesive, the second sealing material 4 is the zinc alloy wire which issandwiched between the two layers of polyimide adhesive andcorresponding to the edge-sealing frame 7, the solder comprises aplurality of air extraction holes, merging and sending the two pieces ofthe glass into a vacuum furnace; pretreating the two pieces of glassprior to or after the merging to remove the gas adsorbed on the glasssurface and the volatile substances in the solder; finally, vacuumizingthe vacuum furnace to less than 0.1 Pa and heating the vacuum furnace toabove a gelling and softening temperature of 350□ of the polyimide,following the softening of the polyimide, sealing the zinc alloy powderusing the softened polyimide by gravity or external pressure so as toprevent the volatilization of the zinc alloy; continuing heating thezinc alloy to above a melting temperature of 380□ thereof, the zincalloy being melted, stopping heating, naturally cooling the furnace,whereby sealing the two pieces of glass by the zinc alloy, opening afurnace door of the vacuum furnace to obtain the vacuum glass.

The inventive step of the present disclosure lies in that: thearrangement of the edge-sealing groove transforms the plane sealing ofthe two pieces of glass into curve sealing, thus improving theairtightness, firmness and reliability of the sealing of the vacuumglass.

Example 19

As shown in FIG. 18, a flat vacuum glass comprises an edge-sealinggroove, three layers of sealing material and two pieces of temperedglass, one of which is a piece of low emissivity glass. The vacuum glassis manufactured as follows: firstly, cutting and acquiring a piece offlat glass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, disposing anedge-sealing groove 8 on one piece of glass, and grinding, chamfering,washing, and drying the two pieces of glass; secondly, putting the twopieces of glass into a tempered furnace; preparing linear supports 6using polyimide adhesive and a glue dispenser, the supports on the upperand lower glass are staggered after the two pieces of glass are merged;uniformly coating two layers of silicone adhesive and one layer ofmagnesium alloy powder on the periphery of one or two pieces of theglass using a coating machine, the magnesium alloy powder beingsandwiched between the two layers of silicone adhesive and correspondingto the edge-sealing groove 8, the first sealing material 3 and the thirdsealing material 5 are silicone adhesive, the second sealing material 4is magnesium alloy powder, the silicone adhesive comprises a pluralityof air extraction holes, merging and sending the two pieces of the glassinto a vacuum furnace; pretreating the two pieces of glass prior to orafter the merging to remove the gas adsorbed on the glass surface andthe volatile substances in the silicone adhesive; finally, vacuumizingthe vacuum furnace to less than 0.1 Pa and heating the vacuum furnace toabove a gelling temperature of the silicone adhesive of 280□, sealingthe magnesium alloy using the silicone adhesive by gravity or externalpressure so as to prevent the volatilization of the magnesium alloy;continuing heating the vacuum furnace to above a melting temperature of320□ of the magnesium alloy, the magnesium alloy being melted; stoppingheating, naturally cooling the furnace, whereby sealing the two piecesof glass by the silicone adhesive and magnesium alloy, opening a furnacedoor of the vacuum furnace to obtain the vacuum glass.

The inventive step of the present disclosure lies in that: thearrangement of the edge-sealing groove transforms the plane sealing ofthe glass into curve sealing, and can flexibly control the thickness ofthe vacuum layer; the linear and ductile supports prepared by thepolyimide adhesives enhance the shock resistance of the vacuum glass,and when the glass breaks, the supports can adhere to the glassfragments and prevent the falling of the glass, thus further enhancingthe safety of the glass.

Example 20

As shown in FIG. 19, a flat vacuum glass comprises two edge-sealinggrooves and three layers of sealing material; the flat vacuum glass isbasically the same as that in Example 19 except that: the lower glass 2comprises an edge-sealing groove 8 corresponding to the edge-sealinggroove 8 on the upper glass 1, thus further strengthening the sealingeffect.

Example 21

As shown in FIG. 11, a flat vacuum glass comprises two edge-sealinggrooves, three layers of sealing material and two pieces of temperedglass, one of which is a piece of low emissivity glass. The vacuum glassis manufactured as follows: firstly, cutting and acquiring a piece offlat glass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, disposing twoedge-sealing grooves 8 on the upper glass 1, and grinding, chamfering,washing, and drying the two pieces of glass; secondly, preparing dottedsupports 6 using tempered glass ink and a glue dispenser on one piece ofglass, putting the two pieces of glass into a tempered furnace where thesupports are sintered on the glass; mechanically grinding the sinteredsupports 6 to flatten the tops thereof, and then rounding top edges ofthe supports so as to eliminate the stress; uniformly coating two layersof high temperature epoxy resin adhesive and one layer of magnesiumalloy powder on the periphery of one or two pieces of the glass using acoating machine, the first sealing material 3 and the third sealingmaterial 5 are the epoxy resin adhesive, the second sealing material 4is magnesium alloy powder, the two layers of epoxy resin adhesive arecorresponding to the two edge-sealing grooves 8, respectively, and themagnesium alloy powder is sandwiched between the two layers of glasssolders; the rest is the same as that in Example 19.

Example 22

As shown in FIG. 12, a flat vacuum glass comprises an edge-sealingframe, an edge-sealing groove, three layers of sealing material and twopieces of tempered glass, one of which is a piece of low emissivityglass. The vacuum glass is manufactured as follows: firstly, cutting andacquiring a piece of flat glass and a piece of low emissivity glass bothhaving dimensions corresponding to a desired shape and size of vacuumglass, disposing an edge-sealing groove 8 on the lower glass 2, andgrinding, chamfering, washing, and drying the two pieces of glass;secondly, disposing an edge-sealing frame 7 on the upper glass 1 usingtempered glass ink and glue dispenser, the edge-sealing frame 7 iscorresponding to the edge-sealing groove 8, then putting the two piecesof glass into a tempered furnace where the prepared edge-sealing frame 7is sintered on the upper glass 1; preparing cylindrical supports 6 usingpolyimide adhesive and a glue dispenser; uniformly coating two layers ofpolyimide adhesive and one layer of low temperature glass solder on theperiphery of one or two pieces of the glass using a coating machine, thelow temperature glass solder being disposed in the edge-sealing groove 8sandwiched between the two layers of polyimide adhesive, the firstsealing material 3 and the third sealing material 5 are polyimideadhesive, the second sealing material 4 is low temperature glass solder,the solder comprises a plurality of air extraction holes; merging andsending the two pieces of the glass into a vacuum furnace; pretreatingthe two pieces of glass prior to or after the merging to remove the gasadsorbed on the glass surface and the volatile substances in theadhesive; finally, vacuumizing the vacuum furnace to less than 0.1 Paand heating the vacuum furnace to above a gelling temperature of 300□ ofthe polyimide adhesive, sealing the low temperature glass solder usingthe polyimide adhesive by gravity or external pressure so as to preventthe gas release, bubbling or carbonization of the low temperature glasssolder 5 under vacuum; the supports 6 and the upper and lower glassbeing tightly contacted; continuing heating the vacuum furnace to abovea melting temperature of 380□ of the low temperature glass solder 5, thelow temperature glass solder 5 being melted, and the supports 6 beingcured on the glass; stopping heating, naturally cooling the furnace,whereby sealing the two pieces of glass by the low temperature glasssolder and polyimide adhesive, opening a furnace door of the vacuumfurnace to obtain the vacuum glass.

Example 23

As shown in FIG. 5, vacuum glass comprises three layers of sealingmaterial, two vacuum layers and at least two pieces of tempered glass,one of which is a piece of low emissivity glass. The vacuum glass ismanufactured as follows: firstly, cutting and acquiring two pieces ofultra-clear glass and a piece of low emissivity glass all havingdimensions corresponding to a desired shape and size of vacuum glass,and grinding, chamfering, washing, and drying the two pieces of glass;secondly, disposing dotted supports 6 on the two pieces of ultra-clearglass using tempered glass ink and a glue dispenser, putting the twopieces of glass into a tempered furnace where the supports are sinteredon the glass, performing semi-tempering on the low emissivity glass;mechanically grinding the sintered supports 6 to flatten the topsthereof, and then rounding top edges of the supports so as to eliminatethe stress; uniformly coating two layers of silicone adhesive and onelayer of magnesium alloy powder on the periphery of the two or threepieces of the glass using a coating machine, the first sealing material3 and the third sealing material 5 are low temperature glass solder, thesecond sealing material 4 is magnesium alloy powder which is sandwichedbetween the two layers of silicone adhesive, the adhesive comprises aplurality of air extraction holes, merging and sending the three piecesof the glass into a vacuum furnace; pretreating the three pieces ofglass prior to or after the merging to remove the gas adsorbed on theglass surface and the volatile substances in the adhesive; finally,vacuumizing the vacuum furnace to less than 0.1 Pa and heating thevacuum furnace to above a gelling temperature of 280□ of the siliconeadhesive 3, sealing the magnesium alloy using the silicone adhesive bygravity or external pressure so as to prevent the volatilization of themagnesium alloy; continuing heating the vacuum furnace to above amelting temperature of 320□ of the magnesium alloy, the magnesium alloybeing melted, stopping heating, naturally cooling the furnace, wherebysealing the three pieces of glass by the magnesium alloy and siliconeadhesive, opening a furnace door of the vacuum furnace to obtain thevacuum glass.

Example 24

As shown in FIG. 20, a flat vacuum glass comprises two sealing layersand two pieces of tempered glass, one of which is a piece of lowemissivity glass. The vacuum glass comprises a piece of upper glass 1, apiece of lower glass 2, and a closed vacuum layer sandwiched between theupper glass 1 and the lower glass 2. The peripheries of the two piecesof glass are welded using one layer of polyimide adhesive 3 and onelayer of metal solder 4. The vacuum glass is manufactured as follows:firstly, cutting and acquiring two pieces of flat glass havingdimensions corresponding to a desired shape and size of vacuum glass,and grinding, chamfering, washing, and drying the two pieces of glass;secondly, disposing supports 6 on the upper glass 1 using tempered glassink and a glue dispenser, coating silver paste on the welding surface ofthe metal solder of the two pieces of glass, putting the two pieces ofglass into a tempered furnace where the prepared supports and coatedsilver slurry are also sintered on the glass; mechanically grinding thesintered supports 6 to flatten the tops thereof, and then rounding topedges of the supports so as to eliminate the stress; uniformly coatingpolyimide adhesive and tin alloy soldering paste on the periphery of oneor two pieces of the glass using a coating machine, the solder comprisesa plurality of air extraction holes, placing a gas absorbent in betweenthe two pieces of the glass, merging and sending the two pieces of theglass into a vacuum furnace; pretreating the two pieces of glass priorto or after the merging to remove the gas adsorbed on the glass surfaceand the volatile substances in the solder; finally, vacuumizing thevacuum furnace to less than 0.1 Pa and heating the vacuum furnace toabove a curing temperature of 250□ of the polyimide, the gas absorbentbeing activated under high temperature and high vacuum, sealing thevacuum layer using the polyimide adhesive which is cured and softened bygravity or external pressure; continuing heating the vacuum furnace toabove a melting temperature of 280□ of the tin alloy, the tin alloybeing softened, stopping heating, naturally cooling the furnace, wherebysealing the two pieces of glass by the tin alloy, opening a furnace doorof the vacuum furnace to obtain the vacuum glass.

Example 25

As shown in FIG. 21, a flat vacuum glass insulation board comprises twolayers of sealing material and two pieces of tempered glass, one ofwhich is a piece of low emissivity glass. The vacuum glass ismanufactured as follows: firstly, cutting and acquiring a piece of flatglass and a piece of low emissivity glass both having dimensionscorresponding to a desired shape and size of vacuum glass, and grinding,chamfering, washing, and drying the two pieces of glass; secondly,disposing strip supports 6 on the two pieces of glass using temperedglass ink and a glue dispenser, the supports on the upper and lowerglass are staggered after the two pieces of glass are merged; puttingthe two pieces of glass into a tempered furnace where the supports 6 aresintered on the glass; mechanically grinding the sintered supports 6 toflatten the tops thereof, and then rounding top edges of the supports soas to eliminate the stress; uniformly coating one layer of magnesiumalloy powder and one layer of low temperature glass solder on theperipheries of one or two pieces of glass using a coating machine, thefirst sealing material 3 is magnesium alloy powder, and the secondsealing material 4 is low temperature glass solder, the solder comprisesa plurality of air extraction holes, merging and sending the two piecesof the glass into a vacuum furnace; pretreating the two pieces of glassprior to or after the merging to remove the volatile substances in thesolder; finally, vacuumizing the vacuum furnace to less than 0.1 Pa andheating the vacuum furnace to above a softening temperature of 280□ ofthe low temperature glass solder, following the softening of the lowtemperature glass solder, sealing the vacuum layer using the lowtemperature glass solder by gravity or external pressure; continuingheating the vacuum furnace to above a melting temperature of 320□ of themagnesium alloy, the magnesium alloy being melted, stopping heating,naturally cooling the furnace, whereby sealing the two pieces of glassby the magnesium alloy, simultaneously, the magnesium volatiles underhigh temperature and vacuum to react with oxygen and nitrogen, whichincreases the vacuum degree and coats the vacuum layer, opening afurnace door of the vacuum furnace to obtain the vacuum glass insulationboard.

Example 26

As shown in FIG. 22, a flat vacuum glass insulation board comprisesedge-sealing frames, two layers of sealing material and two pieces oftempered glass, one of which is a piece of low emissivity glass. Thevacuum glass is manufactured as follows: firstly, cutting and acquiringa piece of flat glass and a piece of low emissivity glass both havingdimensions corresponding to a desired shape and size of vacuum glass,and grinding, chamfering, washing, and drying the two pieces of glass;secondly, disposing edge-sealing frames 7 on the upper glass 1 and thelower glass 2 using tempered glass ink and a glue dispenser, disposingcylindrical supports 6 on the upper glass 1 using tempered glass ink andthe glue dispenser, putting the two pieces of glass into a temperedfurnace where the supports 6 and the edge-sealing frames 7 are sinteredon the glass; uniformly coating one layer of low temperature glasssolder and one layer of zinc alloy wire on the periphery of one or twopieces of the glass using a coating machine, the first sealing material3 is zinc alloy wire, the second sealing material 4 is the lowtemperature glass solder, and the zinc alloy wire is sandwiched betweenthe low temperature glass solder and the edge-sealing frame 7 on thelower glass 2 and is corresponding to the edge-sealing frame 7 on theupper glass 1, the solder comprises a plurality of air extraction holes,merging and sending the two pieces of the glass into a vacuum furnace;pretreating the two pieces of glass prior to or after the merging toremove the volatile substances in the solder; finally, vacuumizing thevacuum furnace to less than 0.1 Pa and heating the vacuum furnace toabove a softening temperature of 350□ of the low temperature glasssolder, following the softening of the low temperature glass solder,sealing the zinc alloy powder using the low temperature glass solder bygravity or external pressure so as to prevent the volatilization of thezinc alloy; continuing heating the zinc alloy to above a meltingtemperature of 380□ of the zinc alloy, the zinc alloy being melted,stopping heating, naturally cooling the furnace, whereby sealing the twopieces of glass by the zinc alloy, simultaneously, the zinc volatilesunder high temperature and vacuum to react with oxygen and nitrogen,which increases the vacuum degree and coats the vacuum layer, opening afurnace door of the vacuum furnace to obtain the vacuum glass insulationboard.

Example 27

As shown in FIG. 23, the example is basically the same as that inexample 19 except that the periphery of one or two pieces of glass issealed by two layers of sealing material, the first layer of sealingmaterial 3 is magnesium alloy powder, the second layer of sealingmaterial 4 is polyimide adhesive, the layer of magnesium alloy powderand the layer of polyimide adhesive are uniformly coated, and themagnesium alloy powder is located in the edge-sealing grooves 8.

Example 28

As shown in FIG. 24, the example is basically the same as that inexample 20 except that the periphery of one or two pieces of glass issealed by two layers of sealing material, the first layer of sealingmaterial 3 is magnesium alloy powder, the second layer of sealingmaterial 4 is polyimide adhesive, the layer of magnesium alloy powderand the layer of polyimide adhesive are uniformly coated, and themagnesium alloy powder is located in the edge-sealing grooves 8

Example 29

As shown in FIG. 25, the example is basically the same as that inexample 12 except that the periphery of one or two pieces of glass issealed by two layers of sealing material, the first layer of sealingmaterial 3 is magnesium alloy powder, the second layer of sealingmaterial 4 is low temperature glass solder, the layer of magnesium alloypowder 3 and the layer of low temperature glass solder 4 are uniformlycoated using a coating machine, and the magnesium alloy powder 3 islocated in the edge-sealing grooves 8

The vacuum glass of the present disclosure can be made of transparentand colorless glass, and used as common window glass, or can beinsulation boards made of opaque or color glass, and used as thermalinsulation wallboards. The vacuum glass and the vacuum glass insulationwallboards all belong to vacuum glass in the broad sense, and thestructure and manufacturing method thereof can be achieved following thestructure and manufacturing method in the present disclosure. The vacuumglass of embodiments of the present disclosure can be used as commonwindow glass, can also be used as vacuum glass thermal insulation boardsfor preparation of thermal insulation wallboards.

Finally it shall be noted that, the above embodiments are only used todescribe but not to limit the technical solutions of the presentdisclosure; and within the concept of the present disclosure, technicalfeatures of the above embodiments or different embodiments may also becombined with each other, the steps may be implemented in an arbitraryorder, and many other variations in different aspects of the presentdisclosure described above are possible although, for purpose ofsimplicity, they are not provided in the details

While particular embodiments of the invention have been shown anddescribed, it will be obvious to those skilled in the art that changesand modifications may be made without departing from the invention inits broader aspects, and therefore, the aim in the appended claims is tocover all such changes and modifications as fall within the true spiritand scope of the invention.

1. Vacuum glass, comprising a piece of upper glass, a piece of lowerglass, and a closed vacuum layer sandwiched between the upper class andthe lower glass, wherein peripheries of the upper glass and the lowerglass are in seal connection using two or more layers of sealingmaterial, the upper glass and the lower glass are convex glass or flatglass, convex surfaces of the convex glass face outward, and supportsare disposed between two pieces of flat glass.
 2. The vacuum glass ofclaim 1, wherein the sealing material is two or three different kinds ofsealing materials selected from glass solders, metal solders, andadhesives, or two or three sealing materials of the same kind.
 3. Thevacuum glass of claim 2, wherein the peripheries of the upper glassand/or the lower glass are provided with at least an edge-sealinggroove.
 4. The vacuum glass of claim 2, wherein a periphery of at leastone glass of the upper glass and the lower glass is provided with anedge-sealing frame, and the edge-sealing frame is integrated with theupper glass and/or the lower glass.
 5. The vacuum glass of claim 4,wherein the seal connection of the upper glass and the lower glass isachieved through the edge-sealing frame and the sealing material, andthe edge-sealing frame of the upper glass and the edge-sealing frame ofthe lower glass are embedded with each other.
 6. The vacuum glass ofclaim 2, wherein a periphery of at least one glass of the upper glassand the lower glass is provided with an edge-sealing frame, and aperiphery of at least one glass is provided with an edge-sealing groove.7. The vacuum glass of claim 6, wherein the seal connection of the upperglass and the lower glass is achieved through the embedment of theedge-sealing frame and the edge-sealing groove.
 8. The vacuum glass ofclaim 3, wherein the sealing material is coated on one or two sides ofthe edge-sealing groove, or coated on a place corresponding to theedge-sealing groove, or placed in the edge-sealing groove.
 9. The vacuumglass of claim 4, wherein the sealing material is coated on theedge-sealing frame, or coated between adjacent edge-sealing frames, orcoated on a place corresponding to the edge-sealing frame.
 10. Thevacuum glass of claim 6, wherein the sealing material is coated on theedge-sealing frame, or coated between adjacent edge-sealing frames, orcoated on a place corresponding to the edge-sealing frame; and thesealing material is coated on one or two sides of the edge-sealinggroove, or coated on a place corresponding to the edge-sealing groove,or placed in the edge-sealing groove.
 11. The vacuum glass of claim 1,wherein the supports are printed on the upper glass or the lower glass,and are dotted or cylindrical in shape.
 12. The vacuum glass of claim 1,wherein the supports are printed on both the upper glass and the lowerglass, and are strip or linear in shape.
 13. A method for manufacturingthe vacuum glass of any of claim 1, the method comprising the followingsteps: 1) cutting and acquiring two pieces of flat glass havingdimensions corresponding to a desired shape and size of the vacuumglass, and grinding, chamfering, washing, and drying the two pieces offlat glass; 2) when manufacturing convex vacuum glass, performing hotbending on the two pieces of flat glass to form convex surfaces; whenmanufacturing flat vacuum glass, disposing the supports on at least onepiece of flat glass, if disposing the supports on the two pieces of flatglass, staggering the supports on the two pieces of glass so as toensure the alternate support of merged upper glass and lower glass; andwhen preparing tempered vacuum glass, tempering the two pieces of glass,respectively; 3) uniformly coating two or more layers of sealingmaterial on peripheries of sealing surfaces of the lower glass or thetwo pieces of glass, the sealing material comprising a plurality ofuniformly-distributed air extraction holes, merging the two pieces ofglass and putting into a vacuum furnace; according to the properties ofthe sealing material and the glass and the requirements of manufacturingprocess, preheating or pre-evacuating the glass prior to or after themerging; and 4) vacuumizing the vacuum furnace to less than 0.1 Pa andheating the vacuum furnace to above a softening temperature of at leastone sealing material, sealing the vacuum layer using the at least onesealing material by gravity or external pressure; continuing heating thevacuum furnace in vacuum or in air to reach a melting temperature of asecond or third sealing material, holding the temperature, stoppingheating, naturally cooling the furnace, whereby sealing the two piecesof glass by the sealing material, opening a furnace door of the vacuumfurnace to obtain the vacuum glass.
 14. The method of claim 13, whereinin 3), the sealing material is two or three different kinds of sealingmaterials selected from glass solders, metal solders, and adhesives, ortwo or three sealing materials of the same kind.
 15. The method of claim13, wherein in 4), following the seal achieved by at least one sealingmaterial, removing the vacuum, heating the vacuum furnace in air toreach a melting temperature of a second or third sealing material,holding the temperature, stopping heating, naturally cooling thefurnace, whereby sealing the two pieces of glass by the sealingmaterial, opening a furnace door of the vacuum furnace to obtain thevacuum glass.
 16. The method of claim 13, wherein in 2), the supportsare made of low temperature glass or high polymers; the supports printedon the upper glass or the lower glass are dotted or cylindrical inshape, and the supports printed on both the upper glass and the lowerglass are strip or linear in shape.
 17. The method of claim 13, whereinthe supports are printed prior to or after the tempering of the glass;when the supports are printed prior to the tempering of the glass, afterbeing tempered, the supports are mechanically ground to remove andflatten tips of the supports, followed by rounding of top edges of thesupports.
 18. The method of claim 13, wherein in 1), prior to grinding,chamfering, washing, and drying, the method further comprises disposingone or more edge-sealing grooves on at least the upper or lower glass.19. The method of claim 13, wherein in 2), the method further comprisesdisposing one or more edge-sealing frames on peripheries of sealingsurfaces of at least one glass of the upper glass and/or the lowerglass; when manufacturing convex vacuum glass, performing hot bending onthe two pieces of flat glass to form convex surfaces; when manufacturingflat vacuum glass, disposing the supports on at least one piece of flatglass, if disposing the supports on the two pieces of flat glass,staggering the supports on the two pieces of glass so as to ensure thealternate support of merged upper glass and lower glass; and whenpreparing tempered vacuum glass, tempering the two pieces of glass,respectively.
 20. The method of claim 13, wherein in 3), the methodcomprises coating two or more two or more layers of sealing material onperipheries of sealing surfaces of the lower glass or the two pieces ofglass prepared in 2), and a second sealing layer is a metal sealinglayer; if the upper glass and/or the lower glass comprises theedge-sealing frame, the sealing material is coated on the edge-sealingframe, or coated between adjacent edge-sealing frames, or coated on aplace corresponding to the edge-sealing frame; if the upper glass and/orthe lower glass comprises the edge-sealing groove, the sealing materialis coated on one or two sides of the edge-sealing groove, or coated on aplace corresponding to the edge-sealing groove, or placed in theedge-sealing groove; the sealing material comprises a plurality ofuniformly-distributed air extraction holes, the two pieces of glass aremerged and put into a vacuum furnace which is a continuous vacuumfurnace or a batch-type vacuum furnace; according to the properties ofthe sealing material and the glass and the requirements of manufacturingprocess, preheating the glass prior to or after the merging.